2. Sterilize the unit before and after each use
3. Don't use thick serums, consistency should be similar to olive oil
4. Use just a few drops of serum per treatment
5. Be sure the device is vertical when using so the serum comes out evenly
6. Simply roll the device across the skin, back and forth 4-5 times
4. Use just a few drops of serum per treatment
5. Be sure the device is vertical when using so the serum comes out evenly
6. Simply roll the device across the skin, back and forth 4-5 times